Research workflows
Cardiothoracic Ratio (CTR)
Transverse cardiac and thoracic measurements on CT or MRI
Measure CTR from chest CT or MRI by comparing the widest horizontal diameter of the heart with the width across both lungs.
Report outputs
Axial cardiothoracic ratio
Maximum cardiac width divided by lung span on the same axial slice. A secondary maximum-lung-span ratio is included in report details.
Maximum cardiac width
Maximum transverse width of the whole heart.
Thoracic span
Lung span at the cardiac measurement slice.
Segmentation outputs
Whole heartLungs
- Image data
- An anonymized chest or chest-abdomen DICOM study or NIfTI volume that includes the complete heart and both lungs.
- Basic subject info
- A pseudonymous subject name is required. No other subject fields are required.
- Study metadata
- No additional study metadata is required. Series description is optional.
How to use
- 1
Upload a complete anonymized DICOM study or NIfTI volume.
- 2
Quality note: Use only when the whole heart and both lungs are included. Review the measurement lines and segmentation.
- 3
Clinical note: CT/MRI CTR is different from CTR measured on a PA chest X-ray.